William O. Douglas

“ But if power to forbid acts includes power to forbid contemplating them, then the power of government over beliefs is as unlimited as its power over conduct and the way is open to force disclosure of attitudes on all manner of social, economic, moral and political issues.' Id., at 438, 70 S.Ct., at 703. ”

“ The words 'within the jurisdiction' must be read not only with the commonsense approach of Friedman but also in light of our constitutional regime. One of many mandates imposed on Congress by the Constitution is the prohibition against bills of attainder. ”

“ He siad:
'Attempts of the courts to fathom modern political meditations of an accused would be as futile and mischievous as the efforts in the infamous heresy trials of old to fathom religious beliefs.' Id., at 437, 70 S.Ct., at 703.
' (E) fforts to weed erroneous beliefs from the minds of men have always been supported by the argument which the Court invokes today, that beliefs are springs to action, that evil thoughts tend to become forbidden deeds. ”